参数估计

I will not believe our labors are lost.

我不相信我们的努力是徒劳的。

A demand deposit is a checking account in which the owner is entitled to receive his or her funds on demand and to write checks on the account, which transfers legal ownership of funds to others.

活期存款帐户是一个支票帐户，这个帐户允许所有者即时收入他的或者她的资金，或者对这个帐户签发支票，这样可以使资金的法定所有者发生转移。